化学法细化高温合金K4169的低周疲劳性能研究

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材料工程 ›› 2004, Vol. 0 ›› Issue (11) : 22-27.

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研究与应用

化学法细化高温合金K4169的低周疲劳性能研究

黄太文¹, 刘林¹, 杨爱民², 熊玉华³, 赵志龙¹

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Effect of Structure Refinement by Addition of Refiner on LCF Properties of Cast Superalloy K4169

HUANG Tai-wen¹, LIU Lin¹, YANG Ai-min², XIONG Yu-hua³, ZHAO Zhi-long¹

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摘要

采用一种新型中间合金复合细化剂,在常规生产工艺条件下对高温合金K4169铸件进行了晶粒细化.测试了常规工艺和细晶铸造工艺两种试样的常温和中温(700℃)条件下的低周疲劳性能.结果表明,这一新型工艺方法能有效细化高温合金K4169晶粒.细晶试样的室温低周疲劳性能有较大的提高,且数据的分散性有所改善;在中温时,疲劳寿命的优劣和疲劳应变幅有关:在小应变幅条件下,细晶仍然有较高的疲劳寿命,在大应变幅条件下,细晶疲劳寿命比粗晶有所降低,但数据的稳定性较好.

Abstract

The ingots of cast superalloy K4169 was refined with the addition of a trace of intermetallic compounds to the melt under conventional casting condition. The low cycle fatigue(LCF) properties were tested both for normal and refined test bars. The results show that the grains can be refined to ASTM 1.7. As a result, LCF life of refined test bars is 1.2-2 times compared to that of normal ones at room temperature. As a contrast, LCF properties at 700℃ are different, depending on the total strain amplitude. LCF life for refined samples are superior than coarse ones at small total strain amplitude, and inferior at high total strain amplitude. Fatigue data fluctuation is improved of fined grains at all conditions.

导出引用

黄太文, 刘林, 杨爱民, 熊玉华, 赵志龙. 化学法细化高温合金K4169的低周疲劳性能研究[J]. 材料工程, 2004, 0(11): 22-27

HUANG Tai-wen, LIU Lin, YANG Ai-min, XIONG Yu-hua, ZHAO Zhi-long. Effect of Structure Refinement by Addition of Refiner on LCF Properties of Cast Superalloy K4169[J]. Journal of Materials Engineering, 2004, 0(11): 22-27

中图分类号： TG113.25 TG146.1

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